<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        // class
        class Person {
            // 静态属性
            static id

            // 静态方法
            static say() {
                console.log('say...');
            }
        }

        Person.id = '1'
        console.log(Person.id)
        Person.say()
    </script>
</body>
</html>